Sink insert



FIG. 1 is a top perspective view of a sink insert showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side elevational view being the mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a cross-sectional view taken on line 7--7 of FIG. 2; and

FIG. 8 is a top plan view of an alternative embodiment thereof. 

The ornamental design for a sink insert, as shown and described. 